“…The experimental groups conducted the music intervention using web-based music applications (including QR code access) [ 14 , 15 , 20 , 24 , 31 , 37 , 38 , 42 ], smartphones [ 20 ], tablets [ 14 , 20 ], computers [ 20 , 42 ], CD players [ 20 , 21 , 34 , 43 ], MP3 players [ 16 , 18 , 33 , 36 , 41 , 44 ], projectors [ 39 ], iPods [ 31 ], or personal/cellular devices [ 32 , 40 ] as the music play devices or software. Over 90% (19/21, 91%) of studies used headphones [ 14 , 16 , 18 , 33 - 39 , 41 , 42 , 44 ], earphones [ 24 , 43 ], or speakers [ 15 , 21 , 31 , 40 ] for delivery of the intervention.…”